Loans and Allowance for Loan Losses (Details 5) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2018	Mar. 31, 2017
With no related allowance recorded:
With no related allowance recorded, Average Recorded Investment	$ 1,825	$ 1,991
With no related allowance recorded, Interest Recognized For The Period Ended	3	7
With an allowance recorded:
With an allowance recorded, Average Recorded Investment	8,402	7,298
With an allowance recorded, Interest Recognized For The Period Ended	55	69
Total average recorded investment	10,227	9,289
Total interest income recognized during the period	58	76
Commercial, financial, and agricultural
With no related allowance recorded:
With no related allowance recorded, Average Recorded Investment	906	555
With no related allowance recorded, Interest Recognized For The Period Ended	0	1
With an allowance recorded:
With an allowance recorded, Average Recorded Investment	1,857	1,192
With an allowance recorded, Interest Recognized For The Period Ended	8	11
Residential Real Estate
With no related allowance recorded:
With no related allowance recorded, Average Recorded Investment	919	807
With no related allowance recorded, Interest Recognized For The Period Ended	3	4
With an allowance recorded:
With an allowance recorded, Average Recorded Investment	4,379	4,511
With an allowance recorded, Interest Recognized For The Period Ended	32	43
Residential Real Estate \| Construction
With an allowance recorded:
With an allowance recorded, Average Recorded Investment	15	0
With an allowance recorded, Interest Recognized For The Period Ended	0	0
Real estate - commercial
With no related allowance recorded:
With no related allowance recorded, Average Recorded Investment	0	589
With no related allowance recorded, Interest Recognized For The Period Ended	0	2
With an allowance recorded:
With an allowance recorded, Average Recorded Investment	2,012	1,494
With an allowance recorded, Interest Recognized For The Period Ended	15	15
Real estate - commercial \| Construction
With no related allowance recorded:
With no related allowance recorded, Average Recorded Investment	0	0
With no related allowance recorded, Interest Recognized For The Period Ended	0	0
With an allowance recorded:
With an allowance recorded, Average Recorded Investment	0	50
With an allowance recorded, Interest Recognized For The Period Ended	0	0
Installment and other consumer
With no related allowance recorded:
With no related allowance recorded, Average Recorded Investment	0	40
With no related allowance recorded, Interest Recognized For The Period Ended	0	0
With an allowance recorded:
With an allowance recorded, Average Recorded Investment	139	51
With an allowance recorded, Interest Recognized For The Period Ended	$ 0	$ 0

Represents Impaired Financing Receivable With No Related Allowance Investment.

No definition available.

Name:	hwbk_ImpairedFinancingReceivableWithNoRelatedAllowanceInvestmentAbstract
Namespace Prefix:	hwbk_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents Impaired Financing Receivable With Related Allowance Investment.

+ References

No definition available.

+ Details

Name:	hwbk_ImpairedFinancingReceivableWithRelatedAllowanceInvestmentAbstract
Namespace Prefix:	hwbk_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5258-111524

+ Details

Name:	us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

+ References

+ Details

Name:	us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of average investment of impaired financing receivables for which there is no related allowance for credit losses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5258-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524

+ Details

Name:	us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of interest income, recognized on accrual basis, on financing receivables that are recognized as impaired, for which there is no related allowance for credit losses.

+ References

+ Details

Name:	us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of average investment of impaired financing receivables for which there is a related allowance for credit losses.

+ References

+ Details

Name:	us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of interest income, recognized on accrual basis, on financing receivables, for which there is a related allowance for credit losses and are recognized as impaired.

+ References

+ Details

Name:	us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=hwbk_CommercialFinancialAndAgriculturalPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=hwbk_ResidentialRealEstatePortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConstructionLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=hwbk_InstallmentAndOtherConsumerPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: